Dental crown gauge



DENTAL CROWN GAUGE Filed Jan. 5. 1933 3 Sheets-Sheet l i i I? q A (D :7 /IITH 4 f6 In en @/$22 I I/ZJV Zola 0m): ar 0 0 j March 1934- w. L. STANSBURY 1,950,865

DENTAL CROWN GAUGE Filed Jan. 5, 1953 3 Sheets-Sheet 2 Inventor W Z1 70m}? I By March 13, 1934. w. L. STANSBURY 1,950,865

DENTAL CROWN GAUGE Filed Jan. 5, 1933 3 Sheets-Sheet 3 Y). J. H

I n Den [or 14 Z. z f/mj /y Patented Mar. 13, 1934 1 UNETED STATES PATENT OFFICE DENTAL CROWN GAUGE William L. Stansbury, Mountain View, Calif.

Application January 5, 1933, Serial No. 650,314

4 Claims. (Cl. 321) This invention relates to a gauge provided 20. Channel part 2c engages the upper edge of for the accurate holding and fitting of dental the block 10 in the manner clearly shown in crowns and inlays, and is an improvement over Figure while secured to the parts 21 is a the gauge forming the subject matter of my perforated metallic plate 22, screws 23 being copending application Serial No. 635,080 filed provided and engageabie with the parts 21 and 60 September 27, 1932. the plate 22 for securing the later in position.

The invention together with its numerous ob- Suitably associated with the perforated plate 22 jects and advantages will be best understood is the section 24 of a dental model. from a study of the following description, taken For minutely adjusting the plates 16, 17 there in connection with the accompanying drawings are provided on the front sides of the plate 10 65 wherein: bearing blocks 25 within which are journalled the Figure 1 is a front elevational view of one form non-threaded head equipped. ends of adjusting of gauge embodying the features of the present screws 26. The free ends of the screws 26 are invention. journaled in sockets 2'? provided on opposite Figure 2 is a front elevational view of a slightly side edges of the formation 11. Threadedly 7 modified form of gauge. engaged with the screws 26 are combination Figure 3 is a front elevational view of the stops and indexes 28, and as will be clear from gauge, certain parts being removed. a study of Figures 3 and 4 each or" the indexes 28 Figure 4 is a sectional View taken substanincludes an intermediate bored portion threadtially on the line 4-4 of Figure 3. edly receiving a screw 26 and end portions 29,

Figure 5 is an end elevational view of the 30; the end portion 29 constituting a stop and structure shown in Figure 3. the end portion 30 constituting an index adapted Figure 6 is a sectionai elevational view 11- to be read against a scale 31 provided on the front lustrating certain details of construction to be face of the block 10. As shown in Figure 3 the hereinafter more fully referred to. channel portions 20 of the plates 16, 17 at one Figure 7 is a plan view of a slidable model end are notched as at 32 for engagement with the carrying plate. end 29 of a member 28 for limiting sliding Figure 8 is a plan view of a perforated plate movement of the plate inwardly toward the embodying the features of the present invention. transverse center of the block 10.

30 Figure 9 is a perspective view of a slide mem- A ferrule or holder designated generally by 35 her forming part of the invention. the reference character 33 comprises a body or Figure 10 is a side elevational view of a block like portion 33a arranged for sliding enslide member forming part of the embodiment of gagement with the mortise groove 12. Engaged the invention shown in Figure 2, and with the plate 10 and the member 33a is an 35 Figure 11 is a bottom plan view of the slide adjusting screw 34 that is adapted to bite into member shown in Figure 10. the block like portion 33a for securing the Referring to the drawings by reference numholder or ferrule 33 at the desired adjustment. erals it will be seen that 10 indicates an oblong The holder 33 also includes a part 331) that plate of Wood or any other suitable material has a tapered opening 35 therethrough, and the provided on its front side with a channeled opening 35 is substantially oval or otherwise block like formation 11 provided with a channel shaped in cross section so that model 3'? will or mortise l2 closed at its upper end through always retain its identical position as will be the medium of a cross bar 13 secured in position clear from a study of Figure 4. For the opening by suitable fastening elements 14. 35 there is provided a sleeve like lining 36 of 45 On the rear face thereof the block 10 is metal or other suitable materal and the sleeve provided with a longitudinal mortise tongue 15; 36 is adapted to be packed with plaster of Paris and adjustabiy associated with the plate 10 is or other plastic material. A tooth model 37 is a pair of sliding plates 16, 17. Each of the adapted to be forced through the plastic maplates 16, 17 includes a flange portion 18 proterial arranged in the sleeve 36, and in this manvided with a mortise groove 19 receiving the ner the model 37 may be readily adjusted mortise tongue 15. vertically.

Each of the plates 16, 17 also includes a chan- The invention as above described is somewhat nel part 20 disposed at right angles to the flange similar to that embodying the subject matter of 13 together with apertured tongue like parts my hereinbefore identified application for pat- 21 extending forwardly from the channel part ent, the present invention differing from that or the referred to application substantially only in the specific means for securing the plates 16, 1'7 at the desired adjustment.

In using the invention as above described a model is first provided, the same being a replica of the patients jaw, in the present instance, the lower jaw, after which the model is divided into sections and the sections herein designated by the reference numeral-24 are'applied to the plates 22 which in turn are secured to the plates 16, 17 in a manner hereinbeiore stated. The plates 16, 1'7 are then adjusted relative to one another to position the teeth on the confronting ends of the model sections 25 the proper distance apart. The distance separating said teeth will of course depend upon the relative position of the teeth of the patient. The model 3'7 is formed of plaster of Paris or the like and is a replica of the tooth to be treated. This model is placed in the holder 33 after which the holder is properly adjusted vertically to dispose the lower end of the model 37 in proper position between the teeth of the sections 24 in a manner suggested in, for example, Figure l. The crown to be placed on the patients tooth is then fashioned on the upper end of the model 3'7 and when completed, the crown designated generally by the reference character 38 will be of the proper size and can be readily fitted to the tooth of the patient.

The present invention is especially concerned with the provision of means supporting a third dental model, the latter being a model of a portion of the upper and lower jaws of the patient in an operative position relative to the model sections 24 and the model 3'7. lhus it will be seen, that in the form of the invention as shown in Figure 1 there is provided an angular supporting arm 40 that is provided at one end with a socket 41. A slide plate 42 is adapted to slidably engage a mortise 12 and to be secured in position through the medium of a screw 43. On the lower end thereof the member 42 is provided with a lateral projection 44 that is formed on its under side in a manner to provide a tapered pin 45 adapted to engage the socket 41. A screw 46 passes upwardly through the socket 41 and has screw threaded engagement with the projection 44 for securing the arm 40 at the desired angular adjustment. The free end of the bracket 40 has detachably mounted thereon a substantially U-shaped member 4'7 which is provided at the bottom thereof with a pin 48 extending through an aperture provided in said free end of the bracket 40. The said pin is provided with a threaded opening with which is engaged a screw 49 that is adapted to bear against the underside of the bracket 40. A second screw 50 is disposed at right angles to the screw 49 and is threadedly engaged with the bracket 40 to bight into the pin 40 so that suitable means is provided for locking the U-shaped member 4'7 at the desired angular adjustment.

Supporting arm 51 has an oifset slotted end 52 arranged between the sides of the U-shaped member 47 and engaged with the sides of said U-shaped member and extending through the slot in the end 52 of arm 51 is a screw 53 that serves to draw the sides of the U -shaped member 4'7 into frictional engagement with end 52 of arm 51 for securing the latter at the desired angular adjustment. Also engaged with the slotted end 52 of arm 51 is a screw 54 and through the medium of the screW 54 the arm 51 may be held in either of two longitudinally adjusting posi tions relative to the plate 10; it being understood that when the arm 51 is so positioned that the bolt 53 is disposed at the upper end of the slot in end 52 of said arm, arm 51 is in position for supporting the model 55 carried thereby in position relative to the models 24 for posterior articulation. When the arm 51 is so adjusted that the screw 53 is arranged in the lower end of the slot in end 52 of arm 51 then the model 53 carried by the arm 51 will be in a position relative to the models 24 for anterior articulation.

The form of the invention shown in Figure 2 differs from that shown in Figure 1 in that instead of having a pin and socket connection between the part 44 and the bracket 40 there is provided a ratchet means for securing the bracket 40 at the desired angular adjustment; thus referring to Figures 2, 10 and 11 it will be seen that slide 42 is provided with the lateral projection 44a which on its under side is provided with a circular series of ratchet teeth 54. The bracket 40 at that end thereof engaged with the projection 44a is also provided with a circular series of ratchet teeth 55 for engagement with the teeth 54 and a screw 46a corresponding to the screw 46 is engaged with the racket 40 and the projection 44a in the manner clearly suggested in Figure 2 for securing the teeth 54 and 55 interengaged.

It is also to be noted, that in each of the forms of the invention shown in Figures 1 and 2, the lateral projections are provided with relatively spaced index lines 56 adapted to be read against a scale 57 carried by the bracket 40 and thus an accurate adjustment of the bracket may be readily ascertained. After an adjustment of the bracket 40 has been made and ascertained by reference to the index 56 and scale 5'7 the models 24, 3'7 and 53 may be suitably marked, so that upon subsequent use thereof the necessary adjustments being known, such adjustments can be readily effected.

Even though I have herein shown and described thepreferred embodiment of the invention, it is to be understood that the same is susceptible of further changes, modifications and improvements coming within the scope of the appended claims.

Having thus described my invention, what I claim as new is:

1. A device for use in building and fitting dental crowns and inlays comprising a base plate, model carrying plates on the base plate and arranged to shift longitudinally thereof relative to one another, means on the model carrying plates for securing sections of a dental model thereto, adjusting screws rotatably mounted on the base plate, combination stops and indexes having threaded engagement with said screws, and means on the model carrying plates engageable with said combination stops and indexes for limiting movement of said model carrying plates inwardly toward one another, together with scales on said base plate against which said combination stops and indexes are adapted to be read in adjusting the model carrying plates.

2. A device for use in building and fitting dental crowns and inlays comprising a base plate, model carrying plates on the base plate and arranged to shift longitudinally thereof relative to one another, means on the model carrying plates for securing sections of a dental model thereto, adjusting screws rotatably mounted on the base plate, combination stops and indexes having threaded engagement with said screws, and

means on the model carrying plates engageable with said combination stop and indexes for limiting movement of said model carrying plates inwardly toward one another, together with scales on said base plate against which said combination stops and indexes are adapted to be read in adjusting the model carrying plates, and a holder slidably mounted on the base plate for movement at right angles to the plane of travel of said model carrying plates, said holder being provided with means for securing a tooth model in operative position to the aforementioned dental model sections.

3. A device for use in building and fitting dental crowns and inlays comprising a base plate, model carrying plates on the base plate and arranged to shift longitudinally thereof relative to one another, means on the model carrying plates for securing sections of a dental model thereto, adjusting screws rotatably mounted on the base plate, combination stops and indexes having threaded engagement with said screws, and means on the model carrying plates engageable with said combination stops and indexes for limiting movement of said model carrying plates inwardly toward one another, together with scales on said base plate against which said combination stops and indexes are adapted to be read in adjusting the model carrying plates, and a holder slidably mounted on the base plate for movement at right angles to the plane of travel of said model carrying plates, said holder being provided with means for securing a tooth model in operative position to the aforementioned dental model sections, a bracket extending from said base plate, and an arm adjustably connected at one end with said bracket, and a dental model carried by said arm for operative position relative to the said dental model sections.

4. A device for use in building and fitting dental crowns and inlays comprising a base plate, model carrying plates on the base plate and arranged to shift longitudinally thereof relative to one another, means on the model carrying plates for securing sections of a dental model thereto, adjusting screws rotatably mounted on the base plate, combination stops and indexes having threaded engagement with said screws, and means on the model carrying plates engageable with said combination stops and indexes for limiting movement of said model carrying plates inwardly toward one another, together with scales on said base plate against which said combination stops and indexes are adapted to be read in adjusting the model carrying plates, and a holder slidably mounted on the base plate for movement at right angles to the plane of travel of said model carrying plates, said holder being provided with means for securing a tooth model in operative position to the aforementioned dental model sections, a bracket extending from said base plate, and an arm adjustably connected at one end with said bracket, and a dental model carried by said arm for operative position relative to the said dental model sections, and means pivotally connected with said bracket and having sliding engagement with the base plate in line with said tooth model holder.

WILLIAM L. STANSBURY. 

